Journeyman Electrician’s Exam Journeyman Electrician's Lighting and Luminaires 2

Question 1

An outlet box used to support a luminaire weighing more than 50 pounds must be:

Accepted Answer

Listed and marked for the weight to be supported

Answer

A metal box secured with a minimum of four mounting screws

Answer

Supported independently of the branch circuit wiring

Answer

Bolted directly to a structural framing member

Question 2

Non-IC rated recessed luminaire housings must maintain a minimum clearance of _____ from combustible material on all sides.

Accepted Answer

1/2 inch

Answer

1/4 inch

Answer

1 inch

Answer

2 inches

Question 3

Emergency lighting systems required by the NEC must provide illumination for a minimum of:

Accepted Answer

90 minutes

Answer

30 minutes

Answer

60 minutes

Answer

120 minutes

Question 4

Conductors at the outlet box that supply a luminaire must have an insulation temperature rating of not less than:

Accepted Answer

75 degrees C (167 degrees F)

Answer

60 degrees C (140 degrees F)

Answer

90 degrees C (194 degrees F)

Answer

The same rating as all other branch circuit conductors in the raceway

Question 5

A luminaire listed for wet locations and installed outdoors must be constructed and installed so that:

Accepted Answer

Water cannot enter or accumulate in wiring compartments or lamp sockets

Answer

It is GFCI protected on a 20-ampere circuit

Answer

The lamp can be accessed without tools for field replacement

Answer

It faces downward to prevent water pooling on the fixture

Question 6

Lighting track (NEC Article 410, Part XIV) is prohibited from installation in all of the following EXCEPT:

Accepted Answer

In a dry commercial office ceiling

Answer

In wet or damp locations without a wet/damp location listing

Answer

Where subject to severe physical damage

Answer

Within the zone of a bathtub or shower

Question 7

According to NEC 410.130(G), the disconnecting means for fluorescent luminaires must disconnect:

Accepted Answer

All conductors simultaneously, including the grounded conductor

Answer

Only the ungrounded (hot) conductors supplying the ballast

Answer

The ballast independently of the lampholders

Answer

The branch circuit only at the panelboard